$OpenBSD: README,v 1.5 2016/12/17 12:11:02 jasper Exp $

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File Descriptors
================
By default, the _elasticsearch user, and so the elasticsearch
server run in the login(1) class of "daemon".
You can query the number of maximum allowed open file descriptors
by running:

	$ ftp -o - "http://localhost:9200/_nodes/stats/process?pretty"

and searching for the "max_file_descriptors" value.

Elasticsearch documentation suggests increasing file descriptor
limits to 32k or even 64k. You can adjust this limit appropriately
by configuring own login(1) class for _elasticsearch user.

For example, add this to the login.conf(5) file:
	elasticsearch:\
		:openfiles=4096:\
		:tc=daemon:

Rebuild the login.conf.db file if necessary:

	# [ -f /etc/login.conf.db ] && cap_mkdb /etc/login.conf

If you are still getting errors about too many open files, you may
need to adjust the kern.maxfiles value so you can further increase
the open files limit in login.conf(5):

	# sysctl -w kern.maxfiles=32768
	# echo "kern.maxfiles=32768" >> /etc/sysctl.conf

Elasticsearch Plugins Management
================================
Elasticsearch plugins management involves running Java code which can download
and execute arbitrary code from the Internet. To avoid running these tasks
as root, use su(1):

	# su -m _elasticsearch -c \
	    "${TRUEPREFIX}/elasticsearch/bin/elasticsearch-plugin install <plugin>"
